Add test property to set the browser time zone

src/org/labkey/test/TestProperties.java

@@ -26,6 +26,8 @@
 import java.nio.file.Files;
 import java.nio.file.StandardOpenOption;
 import java.time.Duration;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -70,6 +72,8 @@ public abstract class TestProperties
         }
     }
 
+    private static ZoneId browserTimeZone = null;
+
     public static void load()
     {
         /* Force static block to run */
@@ -162,6 +166,26 @@ public static boolean isDumpBrowserConsole()
         return getBooleanProperty("webtest.dump.browser.console", false);
     }
 
+    public static ZoneId getBrowserTimeZone()
+    {
+        if (browserTimeZone == null)
+        {
+            String tz = StringUtils.trimToNull(System.getProperty("webtest.browser.tz"));
+            if (tz != null)
+            {
+                String[] split = tz.split("[,\\s]+");
+                tz = split[LocalDateTime.now().getDayOfMonth() % split.length];
+                // Verify that time zone is valid
+                browserTimeZone = ZoneId.of(tz);
+            }
+            else
+            {
+                browserTimeZone = ZoneId.systemDefault();
+            }
+        }
+        return browserTimeZone;
+    }
+
     public static double getTimeoutMultiplier()
     {
         return Math.max(0, getDoubleProperty("webtest.timeout.multiplier", 1.0));

src/org/labkey/test/WebDriverWrapper.java

@@ -96,6 +96,7 @@
 import org.openqa.selenium.firefox.FirefoxProfile;
 import org.openqa.selenium.firefox.GeckoDriverService;
 import org.openqa.selenium.ie.InternetExplorerDriver;
+import org.openqa.selenium.ie.InternetExplorerDriverService;
 import org.openqa.selenium.interactions.Actions;
 import org.openqa.selenium.remote.RemoteWebDriver;
 import org.openqa.selenium.remote.service.DriverService;
@@ -119,6 +120,7 @@
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.time.Duration;
+import java.time.ZoneId;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -210,6 +212,17 @@ protected Pair<WebDriver, DriverService> createNewWebDriver(@NotNull Pair<WebDri
         WebDriver newWebDriver = null;
         DriverService oldDriverService = oldDriverAndService.getRight();
         DriverService newDriverService = null;
+        Map<String, String> browserEnv = new HashMap<>();
+        ZoneId browserTimeZone = TestProperties.getBrowserTimeZone();
+        if (browserTimeZone != ZoneId.systemDefault())
+        {
+            TestLogger.info("Starting browser with TZ = " + browserTimeZone);
+            browserEnv.put("TZ", browserTimeZone.toString());
+        }
+        else
+        {
+            TestLogger.info("Starting browser with TZ = " + browserTimeZone + " (system default)");
+        }
 
         switch (browserType)
         {
@@ -236,7 +249,8 @@ protected Pair<WebDriver, DriverService> createNewWebDriver(@NotNull Pair<WebDri
                 }
                 if (oldWebDriver == null)
                 {
-                    newWebDriver = new InternetExplorerDriver();
+                    newDriverService = new InternetExplorerDriverService.Builder().withEnvironment(browserEnv).build();
+                    newWebDriver = new InternetExplorerDriver((InternetExplorerDriverService) newDriverService);
                 }
                 break;
             }
@@ -276,7 +290,7 @@ protected Pair<WebDriver, DriverService> createNewWebDriver(@NotNull Pair<WebDri
                         options.addArguments("headless");
                     }
 
-                    newDriverService = ChromeDriverService.createDefaultService();
+                    newDriverService = new ChromeDriverService.Builder().withEnvironment(browserEnv).build();
                     newWebDriver = new ChromeDriver((ChromeDriverService) newDriverService, options);
                 }
                 break;
@@ -373,7 +387,10 @@ protected Pair<WebDriver, DriverService> createNewWebDriver(@NotNull Pair<WebDri
                     capabilities.setUnhandledPromptBehaviour(UnexpectedAlertBehaviour.IGNORE);
                     FirefoxOptions firefoxOptions = new FirefoxOptions(capabilities);
 
-                    newDriverService = GeckoDriverService.createDefaultService();
+                    GeckoDriverService.Builder driverServiceBuilder = new GeckoDriverService.Builder()
+                        .withEnvironment(browserEnv);
+
+                    newDriverService = driverServiceBuilder.build();
                     try
                     {
                         newWebDriver = new FirefoxDriver((FirefoxDriverService) newDriverService, firefoxOptions);
@@ -384,7 +401,7 @@ protected Pair<WebDriver, DriverService> createNewWebDriver(@NotNull Pair<WebDri
                         {
                             retry.printStackTrace(System.err);
                             newDriverService.stop();
-                            newDriverService = GeckoDriverService.createDefaultService();
+                            newDriverService = driverServiceBuilder.build();
                             sleep(10000);
                             newWebDriver = new FirefoxDriver((FirefoxDriverService) newDriverService, firefoxOptions);
                         }

test.properties.template

@@ -88,6 +88,8 @@ selenium.reuseWebDriver=true
 #webtest.webdriver.headless=false
 ## Customize browser window size
 #webtest.window.size=1280x1024
+## Set browser time zone
+#webtest.browser.tz=America/New_York
 
 
 #==============================================================================